[Zope] Alternative to "PARENTS[0]"?

Howdi, I use a "link_table" dtml document that has the following snippet: ... <!--#with expr="PARENTS[0]"--> <table <!--#var link_table_properties-->> <!--#in expr="objectValues(spec='Folder')" sort=title--> ... I call this document from all over my site structure to create nice standard tables of links, based on sub folders with common properties. Trouble is I can't use it to render tables from folders other than the current. The PARENTS list always starts with the parent of the initially active document, eg index_html's parent folder. Okay the question is, I think: what is the best way to retrieve a list of objects under a folder that is not the "current" folder?